Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5342723 | Biscationic acid amide and acid imide derivatives as charge controllers | Hans-Tobias Macholdt, Jorg Gitzel, Erwin Dietz | 1994-08-30 |
| 5254796 | Oxidation process | Erwin Dietz | 1993-10-19 |